8420.99.90.00 - Other

This HTS classification, 8420.99.90.00, covers "Other" parts for calendering or other rolling machines, excluding those specifically designed for metals or glass. These parts are utilized in machinery used for processing materials other than metals or glass, and they are not specifically enumerated under other subheadings within the "Parts" category of heading 8420.99. This broad classification is a residual category for parts that do not fit into more specific groupings.

It is important to distinguish this category from its sibling classifications. HTS code 8420.99.10.00 specifically covers parts of machines for processing textiles, while 8420.99.20.00 pertains to parts of machines for making paper pulp, paper, or paperboard. Therefore, 8420.99.90.00 is for parts of rolling or calendering machines that are not intended for textile production or paper manufacturing. Examples of items that might fall here include specialized rollers, shafts, bearings, or housing components for rolling or calendering machines used in industries like rubber, plastics, or wallpaper production, provided they are not specifically covered by the more granular sibling categories.